diff --git a/layouts/partials/toc.html b/layouts/partials/toc.html
index 06053b6a..68d5091c 100644
--- a/layouts/partials/toc.html
+++ b/layouts/partials/toc.html
@@ -1,17 +1,17 @@
-{{- $headers := findRE "<h[1-4].*?>(.|\n])+?</h[1-4]>" .Content -}}
+{{- $headers := findRE "<h[1-6].*?>(.|\n])+?</h[1-6]>" .Content -}}
 {{- $has_headers := ge (len $headers) 1 -}}
 {{- if $has_headers -}}
 
 {{- $largest := 6 -}}
 {{- range $headers -}}
-{{- $headerLevel := index (findRE "[1-4]" . 1) 0 -}}
+{{- $headerLevel := index (findRE "[1-6]" . 1) 0 -}}
 {{- $headerLevel := len (seq $headerLevel) -}}
 {{- if lt $headerLevel $largest -}}
 {{- $largest = $headerLevel -}}
 {{- end -}}
 {{- end -}}
 
-{{- $firstHeaderLevel := len (seq (index (findRE "[1-4]" (index $headers 0) 1) 0)) -}}
+{{- $firstHeaderLevel := len (seq (index (findRE "[1-6]" (index $headers 0) 1) 0)) -}}
 
 {{- $.Scratch.Set "bareul" slice -}}
 <ul>
@@ -20,7 +20,7 @@
         {{- $.Scratch.Add "bareul" (sub (add $largest .) 1) -}}
         {{- end -}}
         {{- range $i, $header := $headers -}}
-        {{- $headerLevel := index (findRE "[1-4]" . 1) 0 -}}
+        {{- $headerLevel := index (findRE "[1-6]" . 1) 0 -}}
         {{- $headerLevel := len (seq $headerLevel) -}}
 
         {{/* get id="xyz" */}}
@@ -28,10 +28,10 @@
 
         {{- /* strip id="" to leave xyz, no way to get regex capturing groups in hugo */ -}}
         {{- $cleanedID := replace (replace $id "id=\"" "") "\"" "" }}
-        {{- $header := replaceRE "<h[1-4].*?>((.|\n])+?)</h[1-4]>" "$1" $header -}}
+        {{- $header := replaceRE "<h[1-6].*?>((.|\n])+?)</h[1-6]>" "$1" $header -}}
 
         {{- if ne $i 0 -}}
-        {{- $prevHeaderLevel := index (findRE "[1-4]" (index $headers (sub $i 1)) 1) 0 -}}
+        {{- $prevHeaderLevel := index (findRE "[1-6]" (index $headers (sub $i 1)) 1) 0 -}}
         {{- $prevHeaderLevel := len (seq $prevHeaderLevel) -}}
         {{- if gt $headerLevel $prevHeaderLevel -}}
         {{- range seq $prevHeaderLevel (sub $headerLevel 1) -}}
@@ -68,9 +68,9 @@
         <a href="#{{- $cleanedID -}}">{{- $header | safeHTML -}}</a>
         {{- end -}}
         {{- end -}}
-        <!-- {{- $firstHeaderLevel := len (seq (index (findRE "[1-4]" (index $headers 0) 1) 0)) -}} -->
+        <!-- {{- $firstHeaderLevel := len (seq (index (findRE "[1-6]" (index $headers 0) 1) 0)) -}} -->
         {{- $firstHeaderLevel := $largest }}
-        {{- $lastHeaderLevel := len (seq (index (findRE "[1-4]" (index $headers (sub (len $headers) 1)) 1) 0)) -}}
+        {{- $lastHeaderLevel := len (seq (index (findRE "[1-6]" (index $headers (sub (len $headers) 1)) 1) 0)) -}}
     </li>
     {{- range seq (sub $lastHeaderLevel $firstHeaderLevel) -}}
     {{- if in ($.Scratch.Get "bareul") (add . $firstHeaderLevel) -}}